Archives: Glossary Terms

A rig in the oil and gas industry is the complete assembly of machinery, equipment, and structures used to drill a wellbore into the earth’s…

Production Tubing is the primary conduit through which reservoir fluids (oil, gas, and water) are transported from the bottom of a wellbore to the surface.…

A packer is a critical downhole isolation device used in oil and gas well construction, completion, and production operations. Its primary function is to create…

Mud circulation is the continuous, closed-loop process of pumping drilling fluid (commonly called “mud”) down the drill string, out through the drill bit, and back…

A liner is a string of casing that is run into a wellbore and hung from the bottom of a previous casing string, rather than…

Horizontal drilling is a directional drilling technique where the wellbore is intentionally deviated from the vertical plane to follow a reservoir layer horizontally or at…

Fracturing, also known as hydraulic fracturing or “fracing,” is a well stimulation technique used in the oil and gas industry to enhance the flow of…

An Electric Submersible Pump (ESP) is a multistage centrifugal pumping system deployed downhole in an oil or water well to lift large volumes of fluid…

Drilling mud, also known as drilling fluid, is a specialized fluid mixture used in rotary drilling operations to drill boreholes into the earth. It is…

A drill string is the entire column of tubular components that extends from the surface drilling equipment (such as the swivel or top drive) down…

A drill bit is the cutting tool attached to the bottom of a drill string used to penetrate subsurface rock formations and create a borehole…

Completion fluid is a specialized liquid used during the final phase of well construction—the completion phase—after drilling is finished and before production begins. Its primary…